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Nb-doped anatase TiO 2 single crystal has been grown by chemical vapour transport method. Raman spectra shows that the obtained crystal with Nb of 0.08wt% has typical anatase structure. An absorption band was observed at around 2.2eV, which seems to be due to the d-d transition in the conduction band. The electron paramagnetic resonance and electric resistivity measurements show that the doped...
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